Thoriq M, Sakti AW, Azizah NN. Learning Mixed Arithmetic Operations Using WhatsApp Groups for Islamic Elementary School Students. IJoTis [Internet]. 1 Maret 2023 [dikutip 16 September 2026];3(1):17-22. Tersedia pada: https://ejournal-dppm.upi.edu/ijotis/article/view/922